Fix translate namespace

components/translate/core/browser/translate_event_details.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_EVENT_DETAILS_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_EVENT_DETAILS_H_
 
 #include <string>
 
 #include "base/time/time.h"
 
+namespace translate {
+
 struct TranslateEventDetails {
   TranslateEventDetails(const std::string& in_filename,
                         int in_line,
                         const std::string& in_message);
 
   // The time when this event was created.
   base::Time time;
 
   // The source filename where this event was created.
   std::string filename;
 
   // The source line in |filename| where this event was created.
   int line;
 
   // The message to show in event logs.
   std::string message;
 };
 
+}  // namespace translate
+
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_EVENT_DETAILS_H_